news:39C5F568.1F0BCC30@enst.fr...

> Not at all, a Klein bottle can exist in 3D space (as the mig
> demonstrates).

For a moment this had me very excited and/or confused. I feel it reflects
badly on me that for a moment I genuinly considered the notion that
jet-fighters might well implement Klein bottles and similiar topology in
their design...

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